rctl 0.4.2 - host updater qualification A

Test prerelease A for managed relay updater qualification. Not a stable release, not promoted to APT, and not recommended for general installation.

Source: 9775071
Relay image: ghcr.io/nobottomline/rctl-relay@sha256:11e66b135de6045580d9dad6ae32fbedb02461951a5f730f63591dcdd5cc0fb9

Includes signed host update catalogs, admin-managed relay updates, opt-in scheduling, durable job/recovery state, Debian-aware device version comparison, and terminal domain-picker cancellation fixes. Both package architectures are included for artifact validation; installing a device package is a separate action.

Build provenance, artifact checksums and catalog signatures verified. Real VPS upgrade and recovery qualification is still in progress. Stable/latest is unchanged.